Periodic jet rotary sprinkler



June 23, 1931. QEHLER 1,811,591

PERIODIC JET ROTARY SPRINKLER.

Filed Jan. 21, 1930 [HHHIIIII HIIHIIIHIHHIHI /n venfor': Theodor Oak/er Patented June 23, 1931 UNITED STATES PATENT OFFICE THEODOIi OEHLER, OF BERLIN-LIGHTERFELDE GERMANY, ASSIGNOR TO THE. FIRM HYDOR G. M. B. H.,REG-ENANLAGEN- UND SILO-BAU, 0F BERLIN-MARIENDORF,

GERMANY Application filed January 21, 1930, Serial No. 422,307, and in Germany August 24, 1927.

The present invention relates to periodic jet rotary sprinklers, and more particularly to a sprinkler of this type which is provided with means for increasing the range of the 'et. J Sprinklers of the rotary type have been used heretofore in which the jet is intermittently interrupted. In the past, such a construction has been a handicap rather than an advantage.

It is the object of the present invention to make use of this periodic interruption of the jet to increase the range of the jet. It is a further object of the invention to provide an air chamber in the supply pipe ofthc sprinkler so that pressure will be built up when the jet is interrupted and will be applied when the jet is released so as to increase the force acting on the water. It is a further object of the invention to provide a sprinkler which will cover a greater area with the same water pressure as heretofore, and without increasing substantially the size or cost of the sprinkler.

Other objects and advantages of the invention will appear more fully from the following description when taken in conjunction with the accompanying drawings.

In the drawings:

Fig. 1 is a vertical section through a sprinkler embodying my invention with parts in lateral elevation.

Fig. 2 is a front elevation of the same.

Fig. 3 is a front elevation of a modified form of wheel.

Fig. 4 is afront elevation of a modified turning arrangement.

The supply pipe at of Fig. 1 is surrounded by an air chamber Z which is concentric therewith and connected thereto. The end of the supply pipe is provided with a member a for-connection to any source of supply, such as the ordinary mains. The upper end a of the supply pipe carries a head I) rotatably mounted thereon. In the head 6 is a nozzle 0 connected to the supply pipe m and having a lateral discharge opening 0.

A wheel 6 is eccentrically mounted on a pivot or pin d carried by the head 6. Around the periphery of this wheel blades 7 are proon the wheel e engages at each rotation one of these pins in and thereby turns the head Z).

In this way, an intermittent rotary motion is given to the head and therefore to the jet. It is obvious that the number and spacing of the pins 7; and 72. may be varied as desired to change the rate of rotation.

" A modified form of wheel is shown in Fig.

In this form, only a portion of the periphery of the wheel 6 is provided with blades 7". Opposite these blades :1 weight g is mounted on the wheel. In this construction, the weight 9 serves to balance the wheel and therefore to Keep it in rotary movement even when the blades 7 are not within the range of the jet. At the same time, the jet in its open position is not obstructed by any blades. The only difierence between this form and that shown in Fig. 2.is that starting movement must be given to the wheel, while the wheel shown in Fig. 2 is self-starting.

In Fig. 4, a second rotary means is disclosed. In this form, the pin it drives a wheel 9 likewise carried by the head, the wheel 9 having pins 2) which engage the pins 70 of the wheel 2'.

The operation of the device is evident.

When the water is turned on, it discharges through the orifice 0 and rotates the wheel 6. Vhen the wheel 6 reaches a position shown in Fig. 2, the orifice is blocked. The flow of water into the supply pipe m builds up a pressure in the air chamber Z greater than that normally present in the supply line. When the nozzle is uncovered by the wheel, this additional pressure acts to discharge the water of the jet to a greater distance than would be possible with a continuous jet or with an interrupted jet in which no air chamber was provided. The rotary movement of the wheel 6 acts to turn the sprinkler gradually so that it will spray in a circle rather than in one direction.

While I have described herein one embodi ment of my invention, I wish it to be understood that I do not intend to limit myself thereby except within the scope of the appended claims.

I claim:

1. In a sprinkler, a supply pipe, a discharge nozzle connected to said supply pipe, an air chamber in said supply pipe, and automatic means for periodically throttling said nozzle.

2. In a sprinkler, a supply pipe, a dis charge nozzle, an air chamber in said supply pipe, a wheel rotatably mounted in front of said discharge nozzle and operated by the jet therefrom to periodically vary the effective cross section of said nozzle.

3. In a sprinkler according to claim 1, said air chamber surrounding said supply pipe and being concentric therewith.

4. In a sprinkler, a supply pipe, a discharge nozzle, an air chamber in said supply pipe, a Wheel rotatably mounted in front of said discharge nozzle and operated by the jet therefrom to periodically open and close the said nozzle.

5. In a sprinkler as claimed in claim 1, means for rotating said nozzle.

6. In a sprinkler as claimed in claim 2, means controlled by said wheel for turning said nozzle.

7. A sprinkler comprising a vertical supply pipe, an air chamber surrounding said supply pipe concentrically and communicating therewith, a head rotatably mounted on said supply pipe, a nozzle in said head, an eccentric Wheel rotatably mounted on said head in front of said nozzle, blades on said wheel in the path of the jet of said nozzle whereby the wheel is turned to cover and uncover the said nozzle, and cooperating means on said wheel and on said supply pipe for turning said head upon rotation of said wheel.

8. In a sprinkler, a supply pipe, a nozzle, an air chamber in said su ply pipe, and means operated by the jet rom the nozzle for periodically throttling the nozzle.

9. In a sprinkler, a supply pipe, a rotatable nozzle, an air chamber in said supply pipe, and means operated by the jet roin the nozzle for periodically throttling the nozzle and for turning said nozzle.

In testimony whereof I afiix my signature.

THEODOR QEHLER. 

